Alloy 75,Haynes 75 Rod,UNS N06075,E FORU

British Specs:BS HR5 Alloy 75 Bar BS HR203 Alloy 75 sheet BS HR403 Alloy 75 tube* BS HR504 Alloy 75 Bar (rivet)，American Specs:，German Specs:WS 2.4630 WS 2.4951,AFNOR NC 20T

### **Technical Datasheet: Alloy 75 (Haynes 75 / UNS N06075) Rod** #### **1. Introduction** Alloy 75, also known by its trade name **Haynes 75** and unified numbering system code **UNS N06075**, is a solid-solution strengthened, nickel-chromium-tungsten alloy. It is renowned for its exceptional high-temperature strength, outstanding resistance to oxidation, and excellent formability and weldability. Originally developed for high-performance applications in the aerospace industry, particularly for gas turbine engines, Alloy 75 maintains its mechanical properties and surface stability at temperatures up to 1200°C (2200°F). It is most commonly supplied in the form of rod, bar, and wire for the fabrication of critical high-temperature components. #### **2. Chemical Composition (Weight % Typical)** The high-temperature performance of Alloy 75 is derived from its carefully balanced chemical composition. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic matrix, providing inherent corrosion resistance and toughness. | | **Chromium (Cr)** | 18.0 - 21.0 | Confers excellent resistance to oxidation and sulfidation. | | **Iron (Fe)** | ≤ 3.0 | Residual element, kept low to avoid detrimental phase formation. | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener, enhancing high-temperature strength. | | **Cobalt (Co)** | ≤ 2.0 | Residual element. | | **Manganese (Mn)**| ≤ 1.0 | Aids in deoxidation during melting. | | **Silicon (Si)** | ≤ 0.50 | Aids in deoxidation and improves oxidation resistance. | | **Carbon (C)** | ≤ 0.10 | Strengthens grain boundaries; controlled to maintain formability. | | **Sulfur (S)** | ≤ 0.015 | Impurity, kept very low to prevent hot shortness. | | **Phosphorus (P)**| ≤ 0.015 | Impurity, kept very low to maintain ductility. | #### **3. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.94 g/cm³ (0.323 lb/in³) | | **Melting Point** | ~ 1370°C (2500°F) | | **Specific Heat** | 431 J/kg·K (0.103 Btu/lb·°F) @ 20°C | | **Thermal Conductivity** | 11.2 W/m·K (77.8 Btu·in/hr·ft²·°F) @ 20°C | | **Thermal Expansion Coefficient** | 12.1 μm/m·°C (6.7 μin/in·°F) @ 20-1000°C | | **Electrical Resistivity** | 1.28 μΩ·m @ 20°C | | **Modulus of Elasticity** | 224 GPa (32.5 x 10⁶ psi) @ 20°C | #### **4. Mechanical Properties (Typical for Rod/Bar)** Properties can vary with section size and processing (hot-worked, annealed, etc.). The following are typical for annealed condition. **At Room Temperature:** * **Tensile Strength:** 760 MPa (110 ksi) * **Yield Strength (0.2% Offset):** 345 MPa (50 ksi) * **Elongation:** 40% **At Elevated Temperature (980°C / 1800°F):** * **Stress-Rupture Strength:** ~ 48 MPa (7 ksi) for 100 hours to rupture #### **5. Key Characteristics & Advantages** * **Excellent High-Temperature Strength:** Retains a significant portion of its strength at temperatures exceeding 1000°C due to solid-solution strengthening from tungsten. * **Superior Oxidation Resistance:** Forms a protective, adherent chromia (Cr₂O₃) scale, making it highly resistant to cyclic oxidation and scaling. * **Good Fabricability:** Can be readily formed and machined using standard techniques for high-temperature alloys. * **Excellent Weldability:** Can be welded using common techniques such as GTAW (TIG) and GMAW (MIG) without post-weld heat treatment for most applications. * **Long-Term Microstructural Stability:** Resists the formation of detrimental phases during long-term exposure at high temperatures. #### **6. Product Applications** Alloy 75 rod is primarily used in the aerospace and industrial heating sectors for critical components that operate under extreme thermal stress. * **Aerospace & Gas Turbines:** * Turbine Stator Vanes * Combustion Chamber Liners * Afterburner Components * Exhaust Systems * Turbine Igniters * **Industrial Furnaces & Heat Treatment:** * Radiant Tubes * Furnace Belts and Trays * Heat Treating Fixtures and Baskets * **Nuclear Engineering:** * Heat Exchanger Components #### **7. International Standards** Alloy 75 (Haynes 75 / UNS N06075) is covered by several international material and specification standards. | Standard Organization | Standard Designation | Form | | :--- | :--- | :--- | | **ASTM International** | **ASTM B435** | UNS N06075 Plate, Sheet, and Strip | | **ASTM International** | **ASTM B572** | UNS N06075 Rod/Bar (Common for rod products) | | **Aerospace (SAE)** | **AMS 5718** | Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 78Ni - 19Cr - 1.5Co - 1.0Mn - 0.50Si (Alloy 75) | | **Unified Numbering System** | **UNS N06075** | - | | **ISO (Europe)** | **ISO 6207 / 9723/9724** | (Covered under similar NiCrW-type designations) | **Note:** While ASTM B435 covers sheet/plate, **ASTM B572** and **AMS 5718** are the most directly relevant specifications for rod, bar, and forging stock. Specific procurement should always reference the required standard. --- **Disclaimer:** The information provided herein is for reference purposes only. Material properties can vary based on manufacturing process, heat treatment, and lot-specific chemistry. For critical applications, always consult the official datasheets from the material producer and the final project specifications.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2054 gallon liquid totes Special package is available on request.